.box1{
	width: 200px;
	height: 100px;
	border: 1px solid red;
	/* background: linear-gradient(to right top,red,yellow); */
	/* background: repeating-linear-gradient(90deg,red,green,blue) */
	background-image: radial-gradient(at top,red, yellow);
	/* 阴影 */
	box-shadow: 0px 0px 7px 5px red ;
}